# OTP Auth vs Authenticator TOTP

The clearest difference is iOS requirement: OTP Auth at 12.0 against Authenticator TOTP's 17.6. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. OTP Auth sells 1 one-off in-app purchase and Authenticator TOTP sells 4 in-app purchases, starting at $3.49 per 7 days. Whichever you choose, the download price is not the number that matters.

OTP Auth ships an update every 2 weeks, Authenticator TOTP fortnightly. The most recent releases landed on October 6, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | OTP Auth | Authenticator TOTP |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (463 ratings)](https://appshunter.io/ios/app/otp-auth/id659877384/reviews)** | — |
| Number of ratings | **463** | — |
| Positive reviews | 77.9% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Fortnightly |
| Monetization | Free with in-app purchases | — |
| Size | 22 MB | 15 MB |
| Requires iOS | **12.0** | 17.6 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Roland Moers](https://appshunter.io/developer/659877387) | [Boris Spiro](https://appshunter.io/developer/1853293003) |

## What reviewers say

### OTP Auth

[App page](https://appshunter.io/ios/app/otp-auth/id659877384)

Enhance your account security with two-factor authentication on your iPhone and iPad. This app supports numerous popular services and offers robust encryption for all your data. It works offline and prioritizes user privacy by not collecting or transmitting personal information.

**Highlights:** Two-factor authentication support, Encrypted iCloud Sync, Siri and Apple Watch support, Notification Center widget, Safari extension for password pasting, Face ID/Touch ID security, Encrypted backups and import/export

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OTP Auth Pro | $3.99 | one-time |

**What reviewers like**

- 🚀 Simple and effective
- 🔒 Secure with backup/restore
- 👍 Great Apple Watch support
- 👍 Intuitive and user-friendly
- 👍 Customizable icons and folders

**What reviewers complain about**

- 🐛 Occasional sync and widget issues
- 🐛 Apple Watch app needs improvements
- 🐛 Unreliable backup/restore for some users
- 🐛 Crashes and bugs reported by a few

**Reported bugs**

- Sync issues causing data loss
- Widget not displaying codes correctly
- Crashes on certain iOS versions

**Requested features**

- Larger text/font size options
- Alphabetical sorting of accounts
- Automatic account refresh/update
- Ability to edit account details


### Authenticator TOTP

[App page](https://appshunter.io/ios/app/authenticator-totp/id6757983630)

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $3.49 | per 7 days |
| Monthly | $7.99 | per month |
| Yearly | $49.99 | per year |
| Lifetime | $79.99 | one-time |


## Frequently asked questions

### Is OTP Auth free?

OTP Auth is free to download, with in-app purchases available.

### Is Authenticator TOTP free?

Authenticator TOTP is free to download, with in-app purchases available.

### Do OTP Auth or Authenticator TOTP have ads?

Neither OTP Auth nor Authenticator TOTP shows ads.

### Which is updated more often, OTP Auth or Authenticator TOTP?

OTP Auth ships an update every 2 weeks, and Authenticator TOTP fortnightly. Most recently, OTP Auth was updated on October 6, 2026 and Authenticator TOTP on October 5, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*